$green = #02a774;
$yellow = #A2A5B5;
$bc = #e4e4e4;
$orgen=#FF800A;
$grey = #F5F5F5

// 一像素下边框
bottom-border-1px($color)
  position relative
  border none
  &:after
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background-color: $color;
    transform: scaleY(0.5);

bottom-1px($color)
  position relative
  border none
  &:after
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 4px;
    background-color: $color;
    transform: scaleY(0.5);

// 一像素上边框
top-border-1px($color)
  position relative
  &::before
    content ''
    position absolute
    z-index 200
    left 0
    top 0
    width 100%
    height 3px
    background-color $color

//根据像素比缩放1px像素边框
@media only screen and (-webkit-device-pixel-ratio: 2 )
  .border-1px
    &::before
      transform scaleY(.5)

@media only screen and (-webkit-device-pixel-ratio: 3 )
  .border-1px
    &::before
      transform scaleY(.333333)

//根据像素比来使用 2x图 3x图
bg-image($url)
  background-image: url($url + "@2x.png")
  @media (-webkit-min-device-pixel-ratio: 3),(min-device-pixel-ratio: 3)
    background-image: url($url + "@3x.png")

//清除浮动
clearFix()
  *zoom 1
  &::after
   content ''
   display block
   clear both
